Machine for making bits.



J. J. MORRIS. MACHINE FOR MAKING BITS.

APPLICATION FILED DEC. 26, 1913. v 4 1 ,123,350. Patented Jan. 5, 1915.

2 SHEETS-SHEET 1.

Inventor,

Witnesses Attorneys THE NORRIS PETERS CD PHOTOVLITHOY, WASHINGTON. D. c.

J. J. MORRIS.

MACHINE FOR. MAKING BITS.

APPLICATION FILED DEC. 26, 1913.

1,123,350. Patented Jan.5,1915.

2 SHEETS-SHEET 2.

Inventor Attorneys 5 C0,. Fflomlmu WASHINGTON. D. r

JOSEPH J. MORRIS, 0F HARRISBURG, ILLINOIS.

MACHINE FOR MAKING BITS.

Specification of Letters Patent.

Patented Jan. 5, 1915.

Application filed December 26, 1913. Serial No. 808,893.

To all whom it may concern Be it known that I, JOSEPH J. MoRRIs, acitizen of the United States, residing at Harrisburg, in the county ofDaline and State of Illinois, have invented a new and useful Machine forMaking Bits, of which the following is a specification.

This invention relates to machines for producing steel bits such as usedin mining machines or coal cutters, one of the objects of the inventionbeing to provide a roller die cooperating with a fixed die wherebyduring the actuation of the parts, a blank supplied to the machine willbe provided with the desired shape.

A further object is to provide a machine of this character utilizingimproved means for feeding blanks into position for engagement by themovable die, there being an adjustable stop for limiting such feedingmovement of the blank.

A further object is to provide improved means whereby the actuation ofthe movable die is efiected, said means being constantly under thecontrol of the operator.

Another object is to provide a machine of this character whereby bitswhich have spread as a result of use, can be readily reshaped andsharpened.

With the foregoing and other objects in view which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the preciseembodiment of the invention herein disclosed, can be made within thescope of what is claimed, without departing from the spirit of theinvention.

In the accompanying drawings the preferred form of the invention hasbeen shown.

In said drawings :Figure 1 is a side elevation of the machine. Fig. 2 isa rear ele va'tion thereof, a portion being broken away. Fig. 3 is anenlarged vertical section through the cooperating dies and showing ablank upon the stationary die and against the gage. Fig. 4 is a planview of the feed mechanism, the adjacent parts of the plunger andstandard of the machine being shown in section. Fig. 5 is a perspectiveView of one form of fixed die which may be used. Fig. 6 is a perspectiveview of another form of fixed die which can be used in connection withthe machine. Fig. 7 is a transverse section through another modifiedform of die particularly designed for use in connection with old bits tobe reshaped or resharpened. Fig. 8 is a section on line AB Fig. 7.

Referring to the figures by characters of reference 1 designates thebase frame'of the machine on which is mounted a standard 2 having aguide extension 3 upon the side portion thereof and to which are securedretaming strips 4. A shaft 5 is journaled in the upper end portion ofthe standard and secured to one end portion of this shaft is a disk 6having a wrist pin 7 connected, by means of a pitman 8, to a plunger 9mounted for reciprocation within the extension 3 and back of the strips4. The lower end of the plunger 9 is reduced, to form a foot 10 adaptedto move downwardly back of a stationary die 11. This die is seated in anangular recess 12 formed in the bottom portion of the standard 2, theupper front corner of the die 11 being overhung by a retaining lip 13while any suitable means, such as a screw 14:, may be extended into thedie from the front wall of the recess 12 for the purpose of anchoringthe die within the recess.

Die 11 has an inclined passage 13 the inner or lower end of which may beof any contour desired. In the drawings the die shown is designed toproduce a bit having an ofiset point and, consequently, the bottom ofthe passage 13 is extended downwardly at the lower end of said passage,as shown at 15. If the front face of the point or offset end of the bitto be formed is tobe flat, the inclined portion 15 of the bottom of thepassage will also be flat, as shown in Fig. 6. If, however, alongitudinal groove is to be formed within the said offset portion ofthe bit, a head, as shown at 16 in Fig. 5 will be provided along theinclined portion 15.

The top of the die 11 is covered by a plate 17 to which is secured ablock 18 adapted to extend downwardly into the upper portion of thepassage, as shown in Fig. 3. presser foot 19 is also extended down intothe passage 13', this presser foot having a stem 20 projecting upwardlytherefrom and through a nut 21 which is screwed into the plateli'. Thisnut 21 constitutes an abutment for a spring 22 which is interposedbetween the nut and the foot 19 and serves to press the foot yieldinglyin a downward direction. .This downward movement of the foot is limitedby a stop nut 23 or the like arranged adjustably on the upper end of thestem 20.

A feed chute'24 is extended forwardly and upwardly from the standard 2,the said chute alining with the passage 13 and having a slide 25therein. This slide has a lug 26 which projects. into a slot 27 formedwithin a lever 28, the said lever being fulcrumed as at 29. upon abracket 30 and there being a spring 31 connected to the lever whereby.the slide 25 isheld normally positioned in the outer end portion of thetrough 24. I

The plunger foot 10 carries a roller 32 which is adapted to travel closeto or in contact with the back edge of the fixed die 11. A cutting tool33 is seated in the foot 10 directly above the roller and is likewiseadapted to travel close to the back surface of the die 11. This cuttingtool is adjustably mounted, any suitable means, such as binding screws34, being provided for holding it against movement after adjustment.

A shaft ,35 is journaled within the lower portion of the standard 2 andbelow the die 11 and extending from this shaft is a stop arm or gage 36.adapted to be swung upwardly to position directly. back of the passage13 in the die 11. A crank arm 37 is secured to the outer end of theshaft 35 and is adapted to be actuated by hand. When this crank arm isswung upwardly the gage or stop arm 36 will be brought to any desiredposition relative to the die 11, the said gage or stop arm beingpreferably curved so that it can be brought to any desired distance fromthe rear face of the die 11. Up ward movement of the gage or stop arm 36can be limited by an adjustable stop pin 38 engaging a supportingbracket 39 depending from one of the retaining strips 4. This pin ispreferably threaded as shown and holding nuts 40 engage the threadedportion and are disposed at opposite sides of the bracket 39.

A drive shaft 41 is journaled in suitable bearings 42 provided thereforand has a gear 43 which constantly meshes with a gear 44 mounted forrotation on the shaft 5. The gear 44 has a clutch member 45. Anotherclutch member 46 is feathered on the shaft 5 and has an annular groove47 into which aholding pin 48 normally projects, this pin being held innormal position by a spring 49. A lever 50 has one end in engagementwith the pin 48 while its other end is connected by a rod 51.to a footlever 52. A cam 53 is formed with the clutch member 46 and a spring 54is interposed between the: stand ard 2. and the clutch member 46 sothat, when theclutch member is released from the holding pin 48, it willbe shifted automatically into engagement with the clutch member 45.

A lever 55 is fulcrumed upon the upper end of the standard 2 and one endof this lever is connected by a yoke 56, to the upper end of the plunger9 while the other end of The hot blank is then placed in the trough 24and lever 28 is actuated so as to cause slide 25 to push against theblank and force it into the passage 13 where it will slide under thepresser foot 19 and against the gage 36, it being understood that thegage is supported in raised position by the operator holding arm 37. Thepresser' foot 19 will frictionally engage the blank to such an extent asto prevent said blank from sliding downwardly out of position within thepasage 13 after the gage 36 has been lowered. As soon as theblankhasbeen positioned, the arm 37 is released, thus permitting thegage to swing downwardly out of active position and lever 28 is alsoreleased so that spring 31 will return the-said lever and slide 25 to.their normal positions. The operator then presses downwardly on the footlever 52 andthis results. in the withdrawal of the pin 48. from thegroove 47. Consequently spring 54, which is under stress, will shiftclutch member 46. into engagement with clutch member 45, thus couplingthe shaft 5 to the rotating gear 44 and causing the pitman 8 to'thrustthe. plunger 9 downwardly. The foot 10 of the plunger will move back ofthe die 11 and the roller 32 will engage the projecting portion of theblank and roll it downwardly into the inner end portion of the passage13 so that an offset portion will thus be produced upon the blank.Furthermore, the cutting or trimming tool 33 which follows directlyafter the roller 32, will smooth off the inner end of the blank thusshaped and remove any surplus metal which may be protruding from the die11. As, soon as the foot lever 52 is depressed, the operator removes,his foot therefrom. so that the pin 48. will spring back against theclutch member 46 and in the path of theicam 53.. Consequently, duringthe completion of the rotation; of the clutch member 46, cam; 53:. willride upon the inner side of pin 48', thus forcing the clutch member 46;back against the. spring 54 until groove. 47 is brought into line withpin 48 whereupon. said: pin will spring up-into the groove. and thuslock clutch member 46 in its set position. The weighted lever 57 willelevate plunger 9 to its uppermost position as soon as the clutchmembers have been disengaged from each other.

For the purpose of sharpening or reshaping used bits, a die such asshown in Figs. 7 and 8 may be employed. This die, which has beenindicated generally at 57 has one side wall of its blank receivingpassage 58 formed of an adjustable block 59 within which is swiveled oneend of a revoluble stem 60. Said stem extends through a bracket 61secured to one side of the die 57 and a lug 62 extends radially from thestem and into a cam slot 63 formed in the bracket. An actuating arm 64extends from the outer end of the stem 60 and by means thereof said stemcan be rotated so as to cause the lug 62 to travel within the slot 63.Consequently the block 59 will be shifted laterally so as either toincrease or diminish the width of the passage 58. Thus it will be seenthat, should it be desired to sharpen or reshape a used bit which hasspread at its active end, it would merely be necessary to shift theblock 59 laterally so as to widen the passage 58 sufliciently to permitthe insertion of the bit. Block 59 is then shifted back toward itsinitial position so as to bind the bit against the opposed walls of thepassage. Plunger 9 is then operated as before and the roller 32 andtrimming tool 33 will operate in the manner described.

It is to be understood that after a blank has been shaped in the mannerhereinbefore described, a new blank can be placed in the trough 24 andpushed to position within the die 11, this specially inserted blankoperating to eject the formed bit from the die 11 and through the openspace 65 formed in the bottom portion of the standard 2 and under theplunger 9.

What is claimed is 1. A machine of the class described including astationary die, a plunger, a roller carried by the plunger for engaginga blank projecting beyond the stationary die and rolling it upon saiddie, and a trimming tool carried by the plunger and adjacent the roller.

2. In a machine of the class described the combination with a stationarydie, of yielding means for automatically gripping and holding blanks ofdifferent thicknesses within the die, a plunger, and a roller carriedbythe plunger for engaging one end portion of the blank to roll it uponthe die.

3. In a machine of the class described, the combination with astationary die having a blank receiving passage formed with an offsetportion, means for varying the width of said passage and means forfeeding a blank into said passage and over the offset portion, of aplunger, and a roller for engaging the blank to roll it into the offsetportion.

4. In a machine of the class described, the combination with astationary die having a blank receiving passage, and means for directinga blank into said passage, of a gage for limiting such movement of theblank, and means for engaging one end portion of the blank to shape itupon the die, said gage being movable into and out of the path of saidlast named means.

5. In a machine of the class described, the combination with astationary die, of means for feeding a blank onto the die, a gage forlimiting the movement of the blank across the die, automatic means forfrictionally engaging the top of the blank to hold it against accidentalmovement irrespective of the thickness of the blank, a plunger, and aroller carried by the plunger for engaging one end portion of the blankto roll it onto the die, said gage being movable into and out of thepath of the plunger.

In testimony that I claim the foregoing as my own, I have hereto aflixedmy signature in the presence of two witnesses.

JOSEPH J. MORRIS.

Witnesses:

SELINA WILLSON, J. R. ToMLIN.

Copies of thil patent may be obtained for ilve cents each, by addressingthe Commissioner or Patents, Washington, D. 0.

